The Rocc module for measurement of airway resistance ... - COSMED
The Rocc module for measurement of airway resistance ... - COSMED
The Rocc module for measurement of airway resistance ... - COSMED
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Product Guide<br />
ROCC<br />
<strong>The</strong> <strong>Rocc</strong> <strong>module</strong> <strong>for</strong> <strong>measurement</strong> <strong>of</strong> <strong>airway</strong> <strong>resistance</strong><br />
in children and uncooperative patients<br />
Application<br />
►►<br />
Pneumology<br />
►►<br />
Pediatric Department<br />
Related Products<br />
►►<br />
Pony FX<br />
Validation<br />
E. Lombardi , et al.<br />
“Comparison Of Two<br />
Devices For Assessment<br />
Of Interrupter Resistance<br />
In Preschool Children”,<br />
Am J Respir Crit Care Med<br />
185;2012:A6148<br />
►►<br />
Interrupter technique (Rrs, int)<br />
►►<br />
High reproducibility and correlation<br />
with body plethysmography tests<br />
►►<br />
Ideal <strong>for</strong> testing non collaborative,<br />
critically ill patients and children<br />
►►<br />
Simplified test manoeuvre<br />
►►<br />
Easy to disinfect<br />
►►<br />
Scientifically validated<br />
<strong>The</strong> <strong>COSMED</strong> <strong>Rocc</strong> <strong>module</strong> allows the <strong>measurement</strong><br />
<strong>of</strong> <strong>airway</strong> <strong>resistance</strong> through the<br />
interrupter technique (Rrs, int). This test<br />
can represent a good alternative to body<br />
plethysmography, because it requires low<br />
patient collaboration and limited capital<br />
investment.<br />
<strong>The</strong> patient is just required to breathe spontaneously<br />
through a mouthpiece while an<br />
occlusion valve interrupts the airflow <strong>for</strong><br />
100 msec. <strong>The</strong> occlusion is virtually imperceptible<br />
to the patient, but long enough to<br />
allow the instantaneous <strong>measurement</strong> <strong>of</strong><br />
the pressure at the mouth, back extrapolate<br />
the alveolar pressure and thus calculate the<br />
<strong>airway</strong> <strong>resistance</strong>.<br />
<strong>The</strong> semplicity <strong>of</strong> the interrupter technique<br />
is particularly appreciated with non-collaborative<br />
patients (critically ill, acute asthma,<br />
geriatric and unconscious patients, neonates,<br />
pre-school children).<br />
<strong>The</strong> interrupter technique is based on the<br />
principle that the alveolar pressure (Pa) is<br />
closely linked to the pressure at the mouth<br />
(Pm) during a transient airflow interruption.<br />
Airway <strong>resistance</strong> (kPa/l/s) is thus the ratio<br />
between the pressure at the mouth (identical<br />
to the alveolar one) and flow value<br />
be<strong>for</strong>e the interruption. This technique<br />
has been proved to be highly reproducible<br />
and correlated against the “Gold Standard”<br />
body plethysmography.<br />
<strong>The</strong> <strong>COSMED</strong> <strong>Rocc</strong> <strong>module</strong> consists <strong>of</strong> a special<br />
handle incorporating a dedicated low<br />
flow PNT and an occlusion valve. All these<br />
components can be easily disinfected and<br />
antibacterial filters can be used to eliminate<br />
the risk <strong>of</strong> cross contamination.<br />
Bronchial dilation tests may also be per<strong>for</strong>med<br />
and results stored and printed together<br />
with predicted values in a comprehensive<br />
graphic and numeric <strong>for</strong>mat.<br />
Operator may choose to actuate the occlusion<br />
valve or let the microprocessor automatically<br />
randomize the flow interruptions.
Technical Specification<br />
Measured Parameters<br />
<strong>Rocc</strong>_ex, Gocc_ex, <strong>Rocc</strong>_in, Gocc_in, Trigger Flow, Bronchial challenge<br />
Hardware<br />
Flowmeter<br />
Power<br />
Back extrapolation algorithm<br />
Standard Packaging includes:<br />
dedicated low flow PNT<br />
no power required<br />
free customization <strong>of</strong> t0, t1, t2 and Trigger flow<br />
<strong>Rocc</strong> PFT Unit, 2 Pneumotachographs, 5 antibacterial filters, 2 Nose Clip, Start Up Guide<br />
Bibliography<br />
P.J. Chowienczyk, C.P. Lawson, S. lane, R. Johnson, N.Wilson, M. Silverman, G.M. Cochrane: “A flow<br />
interruption device <strong>for</strong> <strong>measurement</strong> <strong>of</strong> <strong>airway</strong> <strong>resistance</strong>” (EUR Respir. J 1991, 4, 623-626)<br />
G. Liistro, D. Stanescu, D. Rodenstein, C. Veriter:“Reassesment <strong>of</strong> interrupter technique <strong>for</strong> measuring<br />
flow <strong>resistance</strong> in humans” - (J. Appl. Physiol. 67(3): 933-937, 1989<br />
Real time <strong>Rocc</strong> test (Firmware Screenshot)<br />
Complete configurability <strong>of</strong> flow trigger (ml/s) and <strong>of</strong><br />
the back extrapolation algorithm (t0, t1, t2) (Firmware<br />
Screenshot)<br />
Distributed by:<br />
<strong>COSMED</strong> <strong>COSMED</strong> srl srl<br />
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